The example uses the tag option to match three models.
./domain/domain.go
// Package domain contains business logic models.
package domain
// Account represents a user account.
type Account struct {
ID int `api:"user_id"`
Name string `api:"name"`
Email string `other:"email"`
Username string `api:"username" other:"tag"`
Password string // The password field will not be copied.
}./models/model.go
// Package models contains data storage models (i.e database).
package models
// Account represents the data model for account.
type Account struct {
ID int `api:"id"`
Name string `api:"name"`
Password string
Email string `other:"email"`
}
// User represents the data model for a user.
type User struct {
UserID int `api:"user_id"`
Username string `api:"username,omitempty"`
}# Define where the code is generated.
generated:
setup: ./setup.go
output: ../copygen.go
# Templates and custom options aren't used for this example.Match all fields (.*) according to their respective api tag.
// Copygen defines the functions that are generated.
type Copygen interface {
// tag .* api
ModelsToDomain(*models.Account, *models.User) *domain.Account
}Use pointers to avoid allocations.
copygen -yml path/to/yml
// Code generated by github.com/switchupcb/copygen
// DO NOT EDIT.
// Package copygen contains the setup information for copygen generated code.
package copygen
import (
"github.com/switchupcb/copygen/examples/tag/domain"
"github.com/switchupcb/copygen/examples/tag/models"
)
// ModelsToDomain copies a *models.Account, *models.User to a *domain.Account.
func ModelsToDomain(tA *domain.Account, fA *models.Account, fU *models.User) {
// *domain.Account fields
tA.ID = fU.UserID
tA.Name = fA.Name
tA.Username = fU.Username
}